This is definitely one approach, but I would actually just prefer a full computer, because I do sometimes run other software that is simply not available on any dongles.

One downside though is that I only have a couple HDMI ports to work with, so between a Nintendo Switch and a full desktop PC I'm already using all of the ports.

Also, even though I love the NVIDIA Shield, I find it does not really integrate as well as I hoped via HDMI CEC. It's a bit clunky to be honest, and though it's cool I can use the TV remote over CEC, it is definitely not as good as using the Shield remote, due to latency and some weird behavioral differences. So there are also downsides like that, too...